11. Lady Lynn Forester de Rothschild— £467 million ($673.6 million). Lady de Rothschild married into financial royalty when she said "I do" to Sir Evelyn Robert Adrian de Rothschild. The British billionaire financier is her third marriage and she is now CEO of E.L. Rothschild, a holding company.
10. Inna Gudavadze — £650 million ($938 million). Inna and her family were pretty wealthy but the bulk of her wealth comes from her Georgian billionaire husband "Badri" Patarkatsishvili, who died of a heart attack in 2008. He amassed his wealth through his gold mines, oil, TV, casinos, property, and even a detergent plant.
9. Nancy Shevell — £730 million ($1.05 billion). Shevell married legendary Beatles singer Paul McCartney in 2011 and her wealth has boomed since then. While she brought £150 million (£217 million) to the relationship, from her share of her father's US trucking operation, McCartney is the major source of her wealth.
8. Slavica Ecclestone — £740 million ($1.06 billion). The former Armani model was married to F1 supremo Bernie Ecclestone for 24 years. However, considering her former husband is worth £2.7 billion ($3.9 billion), it comes as no surprise that her sizeable divorce settlement accounts for nearly all her wealth.
7. Mary Haughey, Lady Ballyedmond — £1.4 billion ($2.02 billion). Lady Mary mainly derived her wealth from late husband Lord Ballyedmond, who died in a helicopter crash in 2014. She is now the deputy chairman of the family's Norbrook Laboratories, which is worth £1 billion ($1.44 billion). Despite being the richest person in Northern Ireland, photos of her are hard to come by.
6. Anita Zabludowicz — £1.5 billion ($2.17 billion). Anita's husband Poju Zabludowicz is a world famous art collector with his 3,000-strong Zabludowicz Collection in London. He mainly derives the family's wealth through property and hotels. Only four years ago, he sold the family's British Israel Property operation for £484 million ($700 million).
5. Harriet Heyman — £1.7 billion ($2.45 billion). Heyman can largely thank her husband Michael Moritz for her insane wealth. He's the chairman of venture capital firm Sequoia Capital and was an early investor in Google, PayPal and Yahoo.
4. Salma Hayek — £2.6 billion ($3.75 billion). She's a successful Hollywood actress in her own right, with a personal net worth of £70 million ($101 million). However, her total wealth is largely down to her marriage to London-based François-Henri Pinault, who is the CEO of the second-largest French luxury group Kering, which was founded by his father.
3. Lady Tina Green — £3.5 billion ($5.05 billion). Lady Tina (L) is married to high street fashion magnate Philip Green. The Green family's stake in Arcadia, which includes major British brands like Topshop, is worth £1.9 billion ($2.74 billion). Tina's husband also owns £1.6 billion (£2.3 billion) worth of property, yachts, and past dividends.
2. Carrie Perrodo — £5.8 billion ($8.37 billion). Carrie is the widow of the late Hubert Perrodo, who founded the Franco-British oil company Perenco. When he died in an Alpine climbing accident in 2006, Carrie and her eldest son, Francois, took control of the company.
1. Kirsty Bertarelli — £9.4 billion ($13.56 billion). The singer can thank marrying the richest man in Switzerland for her astonishing wealth, which is more than the Queen and "Harry Potter" author JK Rowling combined. Her husband Ernesto inherited biotech giant Serono from his father then sold it in 2007 for £6.2 billion ($9 billion).
